<template>
  <div>
    <!-- 面包屑导航区域 -->
    <el-breadcrumb separator-class="el-icon-arrow-right">
      <el-breadcrumb-item :to="{ path: '/' }">首页</el-breadcrumb-item>
      <el-breadcrumb-item>商品管理</el-breadcrumb-item>
      <el-breadcrumb-item>参数列表</el-breadcrumb-item>
    </el-breadcrumb>
    <!-- 卡片视图区域 -->
    <el-card>
      <el-alert
        show-icon
        title="注意：只允许为第三级分类添加设置相关参数！"
        type="warning"
        :closable="false"
      >
      </el-alert>
      <!-- 选择商品分类区 -->
      <el-row class="cat_opt">
        <span>选择商品分类：</span>
        <!-- 级联选择框 -->
        <el-cascader
          v-model="selectedCateKeys"
          :options="catelist"
          :props="cateProps"
          @change="cateListHandleChange"
        ></el-cascader>
      </el-row>
      <el-row>
        <!-- tab标签页 -->
        <el-tabs
          v-model="activeName"
          @tab-click="handleTabClick"
        >
          <!-- 动态参数面板 -->
          <el-tab-pane
            label="动态参数"
            name="many"
          >
            <el-button
              size="mini"
              type="primary"
              :disabled='isBtnDisabled'
              class="my-button"
              @click="addDialogVisible = true"
            >添加参数</el-button>
            <!-- 动态参数表格 -->
            <el-table
              :data="manyTableData"
              border
              stripe
            >
              <!-- 展开行 -->
              <el-table-column type="expand">
                <template slot-scope="scope">
                  <!-- 循环tag标签 -->
                  <el-tag
                    class="xh-tag"
                    v-for="(item, i) in scope.row.attr_vals"
                    :key="i"
                    closable
                    @close="hendleClose(i, scope.row)"
                  >{{item}}</el-tag>
                  <!-- 输入的文本框 -->
                  <el-input
                    class="input-new-tag"
                    v-if="scope.row.inputVisible"
                    v-model="scope.row.inputValue"
                    ref="saveTagInput"
                    size="small"
                    @keyup.enter.native="handleInputConfirm(scope.row)"
                    @blur="handleInputConfirm(scope.row)"
                  >
                  </el-input>
                  <!-- 添加按钮 -->
                  <el-button
                    v-else
                    class="button-new-tag"
                    size="small"
                    @click="showInput(scope.row)"
                  >+ New Tag</el-button>
                </template>
              </el-table-column>
              <el-table-column type="index"></el-table-column>
              <el-table-column
                label="参数名称"
                prop="attr_name"
              ></el-table-column>
              <el-table-column label="操作">
                <template slot-scope="scope">
                  <el-button
                    type="primary"
                    icon="el-icon-edit"
                    size="mini"
                    @click="showEditDialog(scope.row.attr_id)"
                  >编辑</el-button>
                  <el-button
                    type="danger"
                    icon="el-icon-delete"
                    size="mini"
                    @click="removeParams(scope.row.attr_id)"
                  >删除</el-button>
                </template>
              </el-table-column>
            </el-table>
          </el-tab-pane>
          <!-- 静态属性面板 -->
          <el-tab-pane
            label="静态属性"
            name="only"
          >
            <el-button
              size="mini"
              type="primary"
              :disabled='isBtnDisabled'
              class="my-button"
              @click="addDialogVisible = true"
            >添加属性</el-button>
            <!-- 静态参数表格 -->
            <el-table
              :data="onlyTableData"
              border
              stripe
            >
              <!-- 展开行 -->
              <!-- 展开行 -->
              <el-table-column type="expand">
                <template slot-scope="scope">
                  <!-- 循环tag标签 -->
                  <el-tag
                    class="xh-tag"
                    v-for="(item, i) in scope.row.attr_vals"
                    :key="i"
                    closable
                    @close="hendleClose(i, scope.row)"
                  >{{item}}</el-tag>
                  <!-- 输入的文本框 -->
                  <el-input
                    class="input-new-tag"
                    v-if="scope.row.inputVisible"
                    v-model="scope.row.inputValue"
                    ref="saveTagInput"
                    size="small"
                    @keyup.enter.native="handleInputConfirm(scope.row)"
                    @blur="handleInputConfirm(scope.row)"
                  >
                  </el-input>
                  <!-- 添加按钮 -->
                  <el-button
                    v-else
                    class="button-new-tag"
                    size="small"
                    @click="showInput(scope.row)"
                  >+ New Tag</el-button>
                </template>
              </el-table-column>
              <el-table-column type="index"></el-table-column>
              <el-table-column
                label="属性名称"
                prop="attr_name"
              ></el-table-column>
              <el-table-column label="操作">
                <template slot-scope="scope">
                  <el-button
                    type="primary"
                    icon="el-icon-edit"
                    size="mini"
                    @click="showEditDialog(scope.row.attr_id)"
                  >编辑</el-button>
                  <el-button
                    type="danger"
                    icon="el-icon-delete"
                    size="mini"
                    @click="removeParams(scope.row.attr_id)"
                  >删除</el-button>
                </template>
              </el-table-column>
            </el-table>
          </el-tab-pane>
        </el-tabs>
      </el-row>
    </el-card>
    <!-- 对话框，添加操作 -->
    <el-dialog
      :title="'添加' + titleText"
      :visible.sync="addDialogVisible"
      width="50%"
      @close="addDialogClosed"
    >
      <!-- 添加参数的对话框 -->
      <el-form
        :model="addForm"
        :rules="addFormRules"
        ref="addFormRef"
        label-width="100px"
      >
        <el-form-item
          :label="titleText"
          prop="attr_name"
        >
          <el-input v-model="addForm.attr_name"></el-input>
        </el-form-item>
      </el-form>
      <span
        slot="footer"
        class="dialog-footer"
      >
        <el-button @click="addDialogVisible = false">取 消</el-button>
        <el-button
          type="primary"
          @click="addParams"
        >确 定</el-button>
      </span>
    </el-dialog>
    <!-- 修改操作 -->
    <el-dialog
      :title="'修改' + titleText"
      :visible.sync="editDialogVisible"
      width="50%"
      @close="editDialogClosed"
    >
      <!-- 添加参数的对话框 -->
      <el-form
        :model="editForm"
        :rules="editFormRules"
        ref="editFormRef"
        label-width="100px"
      >
        <el-form-item
          :label="titleText"
          prop="attr_name"
        >
          <el-input v-model="editForm.attr_name"></el-input>
        </el-form-item>
      </el-form>
      <span
        slot="footer"
        class="dialog-footer"
      >
        <el-button @click="editDialogVisible = false">取 消</el-button>
        <el-button
          type="primary"
          @click="editParams"
        >确 定</el-button>
      </span>
    </el-dialog>
  </div>
</template>

<script>
export default {
  data() {
    return {
      //商品分类列表
      catelist: [],
      //级联选择框数组
      selectedCateKeys: [],
      cateProps: {
        value: "cat_id",
        label: "cat_name",
        children: "children",
      },
      //被集火的标签名称
      activeName: "many",
      //动态数据
      manyTableData: [],
      //静态数据
      onlyTableData: [],
      addDialogVisible: false,
      addForm: {
        attr_name: "",
      },
      addFormRules: {
        attr_name: [
          { required: true, message: "请输入参数名称", trigger: "blur" },
        ],
      },
      //编辑状态框
      editDialogVisible: false,
      //修改表单部分
      editForm: {
        attr_name: "",
      },
      editFormRules: {
        attr_name: [
          { required: true, message: "请输入参数名称", trigger: "blur" },
        ],
      },
      //默认隐藏输入
      inputVisible: false,
      //文本框中输入的内容
      inputValue: "",
    };
  },
  created() {
    this.getCateList();
  },
  methods: {
    //获取所有商品列表
    async getCateList() {
      const { data: res } = await this.$http.get("categories");
      if (res.meta.status !== 200)
        return this.$message.error("获取参数列表失败");
      this.catelist = res.data;
    },
    cateListHandleChange() {
      this.getParamsData();
    },
    //tab点击事件处理函数
    handleTabClick() {
      this.getParamsData();
    },
    //获取参数列表
    async getParamsData() {
      //证明选中不是三级
      if (this.selectedCateKeys.length !== 3) 
      return (this.selectedCateKeys = []);
      //选中三级分类
      //根据所选id和当前所选中的面板获取对应的参数
      const { data: res } = await this.$http.get(
        `categories/${this.cateId}/attributes`,
        {
          params: { sel: this.activeName },
        }
      );
      res.data.forEach((item) => {
        item.attr_vals = item.attr_vals ? item.attr_vals.split(" ") : [];
        //控制显示与隐藏
        item.inputVisible = false;
        item.inputValue = "";
      });
      // console.log(res.data);
      if (res.meta.status !== 200)
        return this.$message.error("获取参数列表失败");
      // console.log(res.data);
      this.activeName === "many"
        ? (this.manyTableData = res.data)
        : (this.onlyTableData = res.data);
    },
    addDialogClosed() {
      this.$refs.addFormRef.resetFields();
    },
    //点击按钮
    addParams() {
      this.$refs.addFormRef.validate(async (v) => {
        if (!v) return;
        const { data: res } = await this.$http.post(
          `categories/${this.cateId}/attributes`,
          {
            attr_name: this.addForm.attr_name,
            attr_sel: this.activeName,
          }
        );
        if (res.meta.status !== 201)
          return this.$message.error("添加参数失败！");
        this.$message.success("添加参数成功！");
        this.addDialogVisible = false;
        this.getParamsData();
      });
      this.addDialogVisible = false;
    },
    //点击按钮展示修改对话框
    async showEditDialog(id) {
      // console.log(id);
      const { data: res } = await this.$http.get(
        `categories/${this.cateId}/attributes/${id}`,
        {
          params: {
            attr_sel: this.activeName,
          },
        }
      );
      if (res.meta.status !== 200) return this.$message.error("修改属性失败");
      // console.log(res);
      this.editForm = res.data;
      this.editDialogVisible = true;
    },
    editDialogClosed() {
      this.$refs.editFormRef.resetFields();
    },
    //点击按钮
    editParams() {
      this.$refs.editFormRef.validate(async (valid) => {
        if (!valid) return;
        const { data: res } = await this.$http.put(
          `categories/${this.cateId}/attributes/${this.editForm.attr_id}`,
          {
            attr_name: this.editForm.attr_name,
            attr_sel: this.activeName,
          }
        );
        if (res.meta.status !== 200) return this.$message.error("修改参数失败");
        this.$message.success("修改参数成功");
        this.getParamsData();
      });
      this.editDialogVisible = false;
    },
    //根据id删除对应的参数项
    removeParams(attr_id) {
      this.$confirm("此操作将永久删除该参数, 是否继续?", "提示", {
        confirmButtonText: "确定",
        cancelButtonText: "取消",
        type: "warning",
      })
        .then(async () => {
          const { data: res } = await this.$http.delete(
            `categories/${this.cateId}/attributes/${attr_id}`
          );
          if (res.meta.status !== 200) return this.$message.error("删除失败");
          this.$message({
            type: "success",
            message: "删除成功!",
          });
          this.getParamsData();
        })
        .catch(() => {
          this.$message({
            type: "info",
            message: "已取消删除",
          });
        });
    },
    //文本框失去焦点或按回车触发
    async handleInputConfirm(row) {
      if (row.inputValue.trim().length !== 0) {
        row.attr_vals.push(row.inputValue.trim());
        const { data: res } = await this.$http.put(
          `categories/${this.cateId}/attributes/${row.attr_id}`,
          {
            attr_sel: row.attr_sel,
            attr_name: row.attr_name,
            attr_vals: row.attr_vals.join(" "),
          }
        );
        // console.log(res);
        if (res.meta.status !== 200) {
          row.inputValue = "";
          row.inputVisible = false;
          return this.$message.error("修改参数失败");
        }
        this.$message.success("修改参数成功！");
      }
      row.inputValue = "";
      row.inputVisible = false;
    },
    //点击按钮，展示文本输入框
    //nextTick 方法的作用，就是当页面上元素被重新渲染之后，才会指定回调函数中的代码
    showInput(row) {
      setTimeout((e) => {
        this.$nextTick((_) => {
          this.$refs.saveTagInput.$refs.input.focus();
        });
      }, 100);
      row.inputVisible = true;
    },
    hendleClose(i, row) {
      row.attr_vals.splice(i, 1);
      this.svaeAttrValue(row);
    },
    //删除标签
    async svaeAttrValue(row) {
      const { data: res } = await this.$http.put(
        `categories/${this.cateId}/attributes/${row.attr_id}`,
        {
          attr_sel: row.attr_sel,
          attr_name: row.attr_name,
          attr_vals: row.attr_vals.join(" "),
        }
      );
    },
  },
  computed: {
    //返回bool值
    isBtnDisabled() {
      return this.selectedCateKeys.length !== 3 ? true : false;
    },
    //当前选中的三级分类Id
    cateId() {
      return this.selectedCateKeys.length === 3
        ? this.selectedCateKeys[2]
        : null;
    },
    titleText() {
      return this.activeName === "many" ? "动态参数" : "静态属性";
    },
  },
};
</script>

<style lang="stylus" scoped>
.el-card {
  margin-top: 15px;

  .cat_opt {
    margin: 15px 0;
  }

  .my-button {
    margin-bottom: 15px;
  }
}

.input-new-tag {
  width: 120px;
}

.xh-tag {
  margin-right: 10px;
}
</style>